A relation of mutual dependence or action or influence.
(grammar) A reciprocal construction involves two noun phrases where each of the participants occupies both the role of agent and patient with respect to the other. see: Wikipedia:Reciprocal pronoun.
“You are sensitive and caring in loving personal relationships and can expect reciprocation from your partner.”
“We know that Athena has asked Zeus for permission to intervene in these events and keep them from turning into an endless series of vengeful reciprocation.”
“As there as yet has been no real reciprocation from the EU's trading partners, agreement on market access still is a long way off.”
reciprocal
(arithmetic) Of a number, the number obtained by dividing 1 by the given number; the result of exchanging the numerator and the denominator of a fraction.
“Negotiating the the degree of reciprocality and obligation involved in linking elsewhere is way beyond me at this point.”
“This reciprocality is intensified online, where the gaps between ask, action and thank you can be shrunk to a matter of seconds.”
“Body's life exist through a plenty relation between inside and outside? a movement disclosing our answer to life? a loneliness becoming only in uninterrupted reciprocality.”